General Hollandite Information
|
Chemical Formula: |
Ba(Mn++++,Mn++)8O16 |
Composition: |
Molecular Weight = 852.99 gm |
| |
Barium 12.88 % Ba 14.38 % BaO |
| |
Sodium 0.27 % Na 0.36 % Na2O |
| |
Manganese 42.51 % Mn 4.16 % MnO / 62.17 % MnO2 |
| |
Aluminum 0.63 % Al 1.20 % Al2O3 |
| |
Iron 8.51 % Fe 12.17 % Fe2O3 |
| |
Silicon 0.33 % Si 0.70 % SiO2 |
| |
Lead 4.86 % Pb 5.23 % PbO |
| |
Oxygen 30.01 % O |
| |
______ ______ |
| |
100.00 % 100.38 % = TOTAL OXIDE |
Empirical Formula: |
Ba0.8Pb0.2Na0.1Mn4+6.1Fe3+1.3Mn2+0.5Al0.2Si0.1O16 |
Environment: |
Primary mineral in contact metamorphism of manganese ores. |
IMA Status: |
Valid Species (Pre-IMA) 1906 |
Locality: |
Manganese deposits of the Central Provinces of India. Link to MinDat.org Location Data. |
Name Origin: |
Named for Thomas Henry Holland (1868-1947), Director of the Indian Geologic Survey. |
Synonym: |
ICSD 27240 |
| |
PDF 38-476 |
| |
Hollandite Image |
Images:
|
|
Hollandite
Comments: Gray, feathery aggregates of hollandite.
Location: Sieben Br?der Mine, Langenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany.
Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag |
|
Hollandite Crystallography
|
Axial Ratios: |
a:b:c =3.4836:1:3.3804 |
Cell Dimensions: |
a = 10.026, b = 2.878, c = 9.729, Z = 1; beta = 91.03° V = 280.68 Den(Calc)= 5.05 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.143(1), 3.101(0.98), 2.412(0.73), |
Crystal Structure:
Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above
|
|
|
Zhang J , Ko J , Hazen R M , Prewitt C T , American Mineralogist , 78 (1993) p.493-499, High-pressure crystal chemistry of KAlSi3O8 hollandite, Pressure = 0.00 GPa
View Additional jPOWD Structure files for Hollandite
[1]
[2]
[3]
[4]
[5]
[6]
[7]
|
|
| |
Physical Properties of Hollandite
|
Cleavage: |
[???] Good |
Color: |
Grayish black, Black, Silver gray. |
Density: |
4.7 - 5, Average = 4.84 |
Diaphaniety: |
Opaque |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Habit: |
Striated - Parallel lines on crystal surface or cleavage face. |
Hardness: |
4-6 |
Luminescence: |
Non-fluorescent. |
Luster: |
Earthy (Dull) |
Streak: |
black |
| |
Optical Properties of Hollandite
|
Optical Data: |
Biaxial (?) |
| |
NCalc= 2.58 - from Gladstone-Dale relationship (KC = 0.3133) where Ncalc=Dcalc*KC+1
NCalc= 2.52 - from Gladstone-Dale relationship (KC = 0.3133) where Ncalc=Dmeas*KC+1 |
RL Anisotrophism: |
Strong. |
RL Color: |
White. |
RL Pleochroism: |
Weak. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Hollandite in Air
| λ |
R1 |
R2 |
 |
∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
31.30 |
37.70 |

 |
|
|
| 420 nm |
31.20 |
37.40 |

 |
| 440 nm |
31.10 |
37.10 |

 |
| 460 nm |
30.50 |
36.50 |

 |
| 480 nm |
29.70 |
35.90 |

 |
| 500 nm |
29.10 |
35.00 |

 |
| 520 nm |
28.50 |
34.20 |

 |
| 540 nm |
27.80 |
33.10 |

 |
| 560 nm |
27.10 |
32.20 |

 |
| 580 nm |
26.60 |
31.50 |

 |
| 600 nm |
26.30 |
30.90 |

 |
| 620 nm |
26.10 |
30.40 |

 |
| 640 nm |
25.80 |
30.00 |

 |
| 660 nm |
25.60 |
29.50 |

 |
| 680 nm |
25.30 |
29.00 |

 |
| 700 nm |
25.00 |
28.30 |

 |
Calculated Relative Intensity Colors of Hollandite in Air
Relative Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
330% |
| R1 |
|
|
|
|
|
|
|
|
|
|
|
| R2 |
|
|
|
|
|
|
|
|
|
|
|
|
| |
Calculated Properties of Hollandite
|
Electron Density: |
relectron=4.65 gm/cc note: rHollandite =5.05 gm/cc. |
Fermion Index |
Fermion Index = 0.03579 Boson Index = 0.96421 |
Photoelectric: |
PEHollandite = 151.07 barns/electron U=PEHollandite x relectron= 703.17 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hollandite is Not Radioactive |
| |
Hollandite Classification
|
Dana Class: |
7.9.1.1 (7)Multiple Oxides |
| |
(7.9)where A B (O)2 |
| |
(7.9.1)Cryptomelane Group (Hard black, fine-grained) |
| |
7.9.1.1 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m |
| |
7.9.1.2 Cryptomelane K(Mn,Mn)8O16 I2/m 2/m |
| |
7.9.1.3 Manjiroite (Na,K)(Mn,Mn)8O16·n(H2O) I 4/m 4/m |
| |
7.9.1.4 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m |
| |
7.9.1.5 Strontiomelane! SrMn6Mn2O16 P 21/m 2/m |
| |
7.9.1.6 Henrymeyerite! BaFeTi7O16 I 4/m 4/m |
Strunz Class: |
IV/D.08-60 IV - Oxides |
| |
IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds) |
| |
IV/D.08 - Cryptomelane group |
| |
IV/D.08-10 Manjiroite (Na,K)(Mn,Mn)8O16·n(H2O) I 4/m 4/m |
| |
IV/D.08-20 Cryptomelane K(Mn,Mn)8O16 I2/m 2/m |
| |
IV/D.08-25 Strontiomelane! SrMn6Mn2O16 P 21/m 2/m |
| |
IV/D.08-30 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m |
| |
IV/D.08-33 Henrymeyerite! BaFeTi7O16 I 4/m 4/m |
| |
IV/D.08-35 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m |
| |
IV/D.08-40 Mannardite BaTi6V2O16·(H2O) I 41/a 4/m |
| |
IV/D.08-50 Redledgeite BaTi6Cr2O16·(H2O) I 41/a 4/m |
| |
IV/D.08-60 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m |
| |
IV/D.08-70 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m |
| |
IV/D.08-80 Cesarolite PbH2Mn3O8 HEX-R Trig |
| |
Other Hollandite Information
|
References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3) |
See Also: |
Links to other databases for Hollandite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - Crocoite.com Mineral Locations
4 - EUROmin Project
5 -Google Images
6 -Google Scholar
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 - Scandinavian mineral gallery
13 - WWW-MINCRYST
14 -École des Mines de Paris
Search for Hollandite using:
[ALTAVISTA]
[AOL]
[About.com]
[All-The-Web]
[HotBot]
[Ixquick]
[LookSmart]
[MAMMA]
[MSN.COM]
[Netscape]
[Teoma]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Hollandite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop
Translate Hollandite Mineral Data :
Ask about Hollandite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Español
Print or Cut-and-Paste your Hollandite Specimen Label here :
|
Hollandite
Ba(Mn++++,Mn++)8O16
Dana No: 7.9.1.1 Strunz No: IV/D.08-60
Locality:
Notes:
|
|
| |
| |
|
| |